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After adding non-volatile solute, freezi...

After adding non-volatile solute, freezing point of water decreases to `-0.186^(@)C`. Calculate `Delta T_(b)` if :
`K_(f) = 1.86 "K kg mol"^(-1) and K_(b) = 0.521 "K kg mol"^(-1)`

A

1.86

B

0.521

C

0.0186

D

0.0521

Text Solution

Verified by Experts

The correct Answer is:
D
`DeltaT_(f)=K_(f)xxm`
`0.186=1.86xxm`....(i)
`DeltaT_(b)=0.521xxm` ....(ii) ltbtgt From eqs. (i) and (ii), `Delta T_(b)=0.0521`]
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